PT-2021-15555 · Keybase · Keybase Desktop Client

Aubrey Cottle + 3 · Published 2021-02-22 · Updated 2021-09-08 · CVE-2021-23827

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions: Keybase Desktop Client versions prior to 5.6.0 on Windows and macOS Keybase Desktop Client versions prior to 5.6.1 on Linux

Description: The issue allows an attacker to obtain potentially sensitive media, such as private pictures, in the Cache and uploadtemps directories. This occurs because the client fails to effectively clear cached pictures, even after deletion via normal methodology within the client, or by utilizing the "Explode message/Explode now" functionality. Local filesystem access is needed by the attacker.

Recommendations: For versions prior to 5.6.0 on Windows and macOS, update to version 5.6.0 or later. For versions prior to 5.6.1 on Linux, update to version 5.6.1 or later. As a temporary workaround, consider restricting access to the Cache and uploadtemps directories until a patch is applied.

Exploit

Fix

Cleartext Storage of Sensitive Information

Weakness Enumeration

CWE-312

Related Identifiers

CVE-2021-23827

Affected Products

Keybase Desktop Client

References · 8

• 🔥 https://johnjhacking.com/blog/cve-2021-23827 · Exploit
• 🔥 https://hackerone.com/reports/1074930 · Exploit
• https://osv.dev/vulnerability/CVE-2021-23827 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-23827 · Security Note
• https://github.com/keybase/client/releases · Note
• https://t.me/secharvester/10641 · Telegram Post
• https://t.me/thebugbountyhunter/5174 · Telegram Post
• https://t.me/cibsecurity/23966 · Telegram Post